Exhaust passive valve for muffler internal components

Abstract

The present invention provides an exhaust passive valve for an internal component of a muffler, comprising a valve body, a concentric shaft, a valve cover, a pre-tightening assembly, and a rotating shaft; the valve body comprises a valve body end plate portion and a valve body tube portion, the valve body end plate portion is arranged at one end of the valve body tube portion, and a valve body hook portion is extended outward from the edge of the valve body end plate portion, and an open rotating space is formed in the valve body hook portion; the concentric shaft passes through the rotating space and can rotate along its own axis; the valve cover is located on one side of the valve body end plate portion, and the edge of the valve cover extends into the rotating space and is fixedly connected to the concentric shaft; the pre-tightening assemblies are respectively arranged at both ends of the valve body hook portion, and the two ends of the concentric shaft are respectively connected to the pre-tightening assemblies; the rotating shaft is arranged parallel to the concentric shaft, and its two ends are respectively fixedly connected to two pre-tightening assemblies; the present application solves the problem that a single elastic element cannot play a good balancing role and is prone to failure after long-term work, resulting in axial offset of the rotating part and jamming between moving parts.

Description

Technical Field

[0001] The present invention relates to the field of exhaust system NVH technology, in particular to an exhaust passive valve for a muffler inner component. Background Art

[0002] As a core component of automotive muffler units, passive exhaust valves play a crucial role in controlling mid- and low-frequency noise. As hybrid vehicles gain market share, exhaust muffler systems are increasingly impacted by the vehicle chassis' boundaries, leading to an overall trend toward volume reduction. Consequently, the development of passive valves that replace muffler volume is gaining increasing attention.

[0003] The existing internal component exhaust passive valve uses a single elastic element (spring or torsion spring) to switch the valve's on / off state;

[0004] In actual use, a single elastic element cannot play a good balancing role and is prone to failure after a long period of work, resulting in axial deviation of the rotating parts and more likely to cause jamming between moving parts.

[0005] Due to the changes in the explosion gas flow inside the engine, unstable airflow pulses will be triggered inside the entire exhaust system (with different characteristics under small, medium and large flow conditions). Under the impact of these unstable airflows, the moving parts (valve cover) in the exhaust valve are prone to vibrate at a certain frequency following the airflow, thereby causing corresponding abnormal noises inside the muffler system, which will affect the subjective evaluation of the vehicle and the noise sound pressure level index. Summary of the Invention

[0006] In response to the shortcomings of the prior art, the present invention provides an exhaust passive valve for a muffler internal component, which has good coaxiality of the rotating parts, good freedom of the elastic element, and good balance and consistency of the preload force on both sides. The technical solution adopted by the present invention is:

[0007] An exhaust passive valve for a muffler inner component, comprising

[0008] The valve body comprises a valve body end plate portion and a valve body tube portion, wherein the valve body end plate portion is arranged at one end of the valve body tube portion, and a valve body hook portion is provided extending outward from the edge of the valve body end plate portion, wherein an open rotation space is formed in the valve body hook portion;

[0009] A concentric shaft that runs through the rotating space and can rotate along its own axis;

[0010] A valve cover is located on one side of the end plate of the valve body, wherein the edge of the valve cover extends into the rotation space and is fixedly connected to the coaxial shaft so that the valve cover can be opened or closed on one side of the end plate of the valve body;

[0011] Pre-tightening components are respectively arranged at both ends of the valve body hook portion, and both ends of the concentric shaft are respectively connected to the pre-tightening components to provide pre-tightening force for the valve cover;

[0012] as well as

[0013] The rotating shaft is arranged parallel to the concentric axis, and its two ends are fixedly connected to the two preloaded components respectively;

[0014] Wherein, the axis of the concentric shaft and the axis of the rotating shaft are respectively perpendicular to the axis of the valve body tube portion.

[0015] Furthermore, the pre-tightening assembly includes a shaft support, a torsion spring and a chuck;

[0016] The shaft support is fixed to one end of the hook portion of the valve body, and the chuck is fixed to the concentric shaft;

[0017] The torsion spring is sleeved on a concentric shaft, one of the pins of the torsion spring is fixed on the rotating shaft, and the other pin of the torsion spring is fixed on the chuck;

[0018] There is an axial gap between the torsion spring and the shaft support, and between the torsion spring and the chuck.

[0019] Furthermore, a plurality of torsion spring clamping holes for inserting the pins of the torsion springs are evenly distributed on the end surface of the chuck, and the plurality of torsion spring clamping holes form a circle, the center of which is located on the axis of the concentric shaft.

[0020] Furthermore, both ends of the hook portion of the valve body are respectively contracted inward to form an accommodating groove, and the shaft support is arranged in the accommodating groove.

[0021] Furthermore, the end surface of the shaft support protrudes outward to form a protrusion, a concentric shaft hole for inserting the concentric shaft is provided in the middle of the protrusion, a bearing is provided inside the protrusion, and the bearing is sleeved on the concentric shaft; and / or,

[0022] A rotating shaft hole for inserting the rotating shaft is provided on the end surface of the shaft support.

[0023] Furthermore, it also includes two damping assemblies, which are respectively arranged on the inner sides of the two pre-tightening assemblies;

[0024] The damping assembly includes a damping spring and a damping plate. The damping spring is arranged on a concentric shaft, and the damping plate is pressed against the end surface of the shaft support by the elastic force of the damping spring.

[0025] Furthermore, the concentric shaft includes a middle section, a shoulder, an edge section and an edge section groove, the shoulders are respectively provided at both ends of the middle section, the edge section is provided at the other end of the shoulder, and the edge section groove extends from the other end of the edge section to the shoulder;

[0026] The valve cover is connected to the middle section, the damping spring is sleeved on the edge section and located between the shaft shoulder and the damping plate, and one pin of the damping spring is inserted into the groove of the edge section.

[0027] Furthermore, the valve body further comprises a valve body diaphragm portion, which is arranged at the other end of the valve body tube portion, so that the gas flowing axially toward the valve body tube portion is blocked by the valve body diaphragm portion and flows in the circumferential direction of the valve body tube portion;

[0028] A plurality of valve body pipe openings are distributed on the cylindrical surface of the valve body tube portion. The gas passing through the circumference of the valve body tube portion enters the interior of the valve body tube portion from the valve body pipe openings and finally flows out from the valve body end plate opening on the valve body end plate portion.

[0029] Furthermore, a valve body extension portion is provided on one circumferential edge of the valve body end plate portion, and the valve cover is located inside the valve body extension portion.

[0030] Furthermore, a sealing gasket is provided between the end plate portion of the valve body and the valve cover, and the sealing gasket is fixedly connected to the end plate portion of the valve body.

[0031] Advantages of the present invention:

[0032] 1. The rotating parts use concentric shafts and rotating shafts with good coaxiality. When the preload components on both sides cooperate with the concentric shafts to balance the torque, the consistency of the initial preload angles of the two torsion springs can be ensured. The torque value shared on each torsion spring is reduced, which is beneficial to increase the service life of the exhaust passive valve used in the muffler components.

[0033] 2. The axial clearance on both sides of the torsion spring prevents the axial displacement caused by the rotation of the torsion spring from getting stuck, and the elastic characteristics of the torsion spring can be fully exerted;

[0034] 3. The arrangement of the damping components can enhance the ability of the rotating parts to resist airflow interference;

[0035] 4. The diaphragm part of the valve body is set to block the wind and change the direction of the airflow, weakening the uneven impact of the unstable airflow on the valve cover, avoiding the vibration caused by the unstable airflow directly impacting the valve cover, and eliminating the corresponding abnormal noise generated inside the silencer system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a radial cross-sectional view of the present invention.

[0037] Figure 2 This is a structural diagram of the present invention without the valve cover.

[0038] Figure 3 It is a structural diagram of the valve body of the present invention.

[0039] Figure 4 It is an assembly diagram of the present invention.

[0040] Figure 5 It is a structural diagram of the shaft support of the present invention.

[0041] Figure 6 It is a plan view of the concentric shaft 20 of the present invention.

[0042] Figure 7 Schematic diagram of airflow guidance when the valve cover of the present invention is opened.

[0043] In the figure: 10-valve body, 20-concentric shaft, 30-valve cover, 40-pretightening assembly, 50-rotating shaft, 60-damping assembly, 70-air flow guide, 80-sealing gasket, 110-valve body end plate, 110a-valve body end plate opening, 120-valve body pipe portion, 120a-valve body pipe opening, 130-valve body diaphragm portion, 140-valve body hook portion, 150-rotating space, 160-valve body extension portion, 210-middle section, 220-shaft shoulder, 230-edge section, 240-edge section groove, 410-shaft support, 410a-protrusion, 410b-concentric shaft hole, 410c-rotating shaft hole, 420-torsion spring, 430-chuck, 430a-torsion spring clamping hole, 440-bearing, 610-damping spring, 620-damping plate. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] Please see the attached Figure 1-3 The present invention provides an exhaust passive valve for a muffler inner component, comprising a valve body 10, a concentric shaft 20, a valve cover 30, a pre-tightening assembly 40, and a rotating shaft 50; the valve body 10 comprises a valve body end plate portion 110 and a valve body pipe portion 120, the valve body end plate portion 110 being arranged at one end of the valve body pipe portion 120, a valve body hook portion 140 extending outward from the edge of the valve body end plate portion 110, and an open rotating space 150 being formed in the valve body hook portion 140; the concentric shaft 20 passes through the rotating space 150 and can rotate along its own axis; the valve cover 30 is located at one end of the valve body end plate portion 110 On the side, the edge of the valve cover 30 extends into the rotating space 150 and is fixedly connected to the concentric shaft 20, so that the valve cover 30 is opened or closed on one side of the valve body end plate 110; the pre-tightening components 40 are respectively arranged at both ends of the valve body hook 140, and the two ends of the concentric shaft 20 are respectively connected to the pre-tightening components 40 to provide pre-tightening force for the valve cover 30; the rotating shaft 50 is arranged parallel to the concentric shaft 20, and its two ends are respectively fixedly connected to the two pre-tightening components 40; wherein, the axis of the concentric shaft 20 and the axis of the rotating shaft 50 are respectively perpendicular to the axis of the valve body tube 120.

[0046] The pre-tightening assembly 40 includes a shaft support 410, a torsion spring 420 and a chuck 430; the shaft support 410 is fixed to one end of the valve body hook 140, and the chuck 430 is fixed on the concentric shaft 20; the torsion spring 420 is sleeved on the concentric shaft 20, one of the pins of the torsion spring 420 is fixed on the rotating shaft 50, and the other pin of the torsion spring 420 is fixed on the chuck 430; wherein, there is an axial gap between the torsion spring 420 and the shaft support 410, and between the torsion spring 420 and the chuck 430 respectively; in order to make the concentric shaft 20 and the shaft support 410 rotatably connected, a bearing 440 is installed between the concentric shaft 20 and the shaft support 410.

[0047] In a specific embodiment, as shown in the attached Figure 4 As shown, the passive valve body end plate 110 before use is welded and fixed with the airflow guide 70, and the airflow guide 70 is welded on the pipeline or the partition inside the muffler, and the diameter of the airflow guide 70 is larger than the diameter of the valve body pipe 120; or the pipeline is directly welded on the valve body end plate 110, and the pipeline diameter is larger than the diameter of the valve body pipe 120 (not shown); the valve body end plate 110 is welded and fixed with the valve body pipe 120, and the valve body hook 140 is integrally formed with the valve body end plate 110, and the valve body end plate 110 is circular, and its plane is perpendicular to the valve body pipe. 120, so the concentric shaft 20 and the rotating shaft 50 are parallel to the valve body end plate 110, the valve body hook 140 extends in the left-right direction, and the valve body tube 120 extends in the front-back direction; during assembly, the shaft support 410 is welded and fixed to the left and right ends of the valve body hook 140, and the chuck 430 is welded and fixed on the concentric shaft 20, so the concentric shaft 20 ensures the coaxiality of the left and right torsion springs 420, so that the valve cover 30 is evenly stressed on the left and right, especially avoiding deformation when installing the bearing 440 and the shaft support 410, and avoiding abnormal noise of the passive valve caused by imbalance of torque at both ends.

[0048] Since the axial gap is reserved, the torsion spring 420 generates elastic deformation during the rotation of the coaxial shaft 20. At this time, the axial extension of the torsion spring 420 will not cause jamming, and the elastic characteristics of the torsion spring 420 can be better exerted.

[0049] As attached Figure 2 As shown, a plurality of torsion spring clamping holes 430 a for inserting the pins of the torsion spring 420 are evenly distributed on the end surface of the chuck 430 , and the plurality of torsion spring clamping holes 430 a form a circle, the center of which is located on the axis of the concentric shaft 20 .

[0050] When the pre-tightening torque on the left and right sides of the valve cover 30 differs greatly, it will cause an imbalance in the torque on the left and right ends of the passive valve, and will also cause abnormal noise in the passive valve. Therefore, by inserting the pins of the torsion springs 420 on the left and right sides into the corresponding torsion spring holes 430a on the two chucks 430, the pre-tightening reference angle can be unified to ensure the consistency of the pre-tightening torque.

[0051] As attached Figure 2 and 3 As shown, both ends of the valve body hook portion 140 are respectively contracted inward to form a receiving groove 140 a , and the shaft support 410 is arranged in the receiving groove 140 a .

[0052] The valve body hook 140 not only provides a rotation space for the valve cover 30 to avoid mutual interference of moving parts, but also provides a hidden space for the concentric shaft 20, and facilitates the welding positioning of the two shaft supports 410, achieving three goals at one stroke, with high structural strength and reduced production costs.

[0053] By providing a receiving groove 140a having a shape matching that of the shaft support 410, the welding positioning between the shaft support 410 and the valve body hook 140 is made more convenient, without having to consider the welding positioning between the concentric shaft 20 and the valve body 10, and thus without having to overly rely on the accuracy of the welding equipment.

[0054] As attached Figure 1 and 5 As shown, the end surface of the shaft support 410 protrudes outward to form a protrusion 410a, and a concentric shaft hole 410b for inserting the concentric shaft 20 is provided in the middle of the protrusion 410a. A bearing 440 is provided on the inner side of the protrusion 410a, and the bearing 440 is sleeved on the concentric shaft 20; the protrusion 410a not only reserves installation space for the bearing 440, but also facilitates its positioning; the end face of the shaft support 410 is provided with a rotating shaft hole 410c for inserting the rotating shaft 50.

[0055] In order to avoid motion interference between components, the rotating shaft 50 is disposed on the upper side of the concentric shaft 20 and is higher than the valve body hook portion 140 .

[0056] As an embodiment of the present application, the bearing 440 is a powder metallurgy bearing. Due to the wear-resistant characteristics of the bearing, it can ensure that the degree of wear is small after long-term work and the service life is long. In addition, lubricating grease can be applied to the surface of the powder metallurgy bearing to reduce friction.

[0057] As attached Figure 1As shown, the present application also includes two damping assemblies 60, and the two damping assemblies 60 are respectively arranged on the inner sides of the two pre-tightening assemblies 40; the damping assembly 60 includes a damping spring 610 and a damping plate 620, and the damping spring 610 is arranged on the concentric shaft 20, and the damping plate 620 is pressed against the end face of the shaft support 410 by the elastic force of the damping spring 610; by arranging the damping assembly 60, a certain damping force is generated when the valve cover 30 is opened or has a tendency to open, thereby reducing the vibration of the valve cover caused by airflow fluctuations to a certain extent.

[0058] As attached Figure 1 and 6 As shown, the concentric shaft 20 includes a middle section 210, a shoulder 220, an edge section 230 and an edge section groove 240. The shoulders 220 are respectively provided at both ends of the middle section 210, the edge section 230 is provided at the other end of the shoulder 220, and the edge section groove 240 extends from the other end of the edge section 230 to the shoulder 220.

[0059] Specifically, the valve cover 30 is connected to the middle section 210 , the damping spring 610 is sleeved on the edge section 230 and located between the shaft shoulder 220 and the damping plate 620 , and one pin of the damping spring 610 is inserted into the edge section groove 240 .

[0060] The shoulder 220 plays a positioning role, facilitating the installation and positioning of adjacent components. One pin of the damping spring 610 is stuck in the edge segment groove 240 to achieve synchronous rotation with the concentric shaft 20, thereby increasing the positive pressure on the damping plate 620, thereby increasing the static friction generated when the concentric shaft 20 rotates, and enhancing the valve cover 30's ability to resist airflow interference.

[0061] In addition, please see the attached Figure 3 and 7 The valve body 10 of the present application further includes a valve body diaphragm portion 130, which is provided at the other end of the valve body tube portion 120, so that the gas flowing toward the valve body tube portion 120 in the axial direction is blocked by the valve body diaphragm portion 130 and flows in the circumferential direction of the valve body tube portion 120;

[0062] Several valve body pipe openings 120 a are evenly distributed on the cylindrical surface of the valve body tube portion 120 . The gas passing through the circumference of the valve body tube portion 120 enters the interior of the valve body tube portion 120 from the valve body pipe openings 120 a and finally flows out from the valve body end plate openings 110 a on the valve body end plate portion 110 .

[0063] It should be noted that the present application does not specify the shape of the valve body pipe opening 120a, which may be circular, square, elliptical or triangular.

[0064] As an embodiment of the present application, the axial cross-sectional shape of the valve body diaphragm portion 130 is arc-shaped, with the center of the arc facing the valve body end plate portion 110, and the valve body diaphragm portion 130 with different arcs can be selected according to different engine powers; therefore, when there is an unstable airflow blowing from back to front in the pipeline, the valve body diaphragm portion 130 disperses the airflow to the circumference of the valve body tube portion 120, and then enters the interior of the valve body tube portion 120 along the valve body pipe opening 120a, which can greatly reduce the interference of the unstable airflow on the valve cover 30 and reduce the probability of vibration.

[0065] As attached Figure 3 and 4 As shown, a valve body extension portion 160 is provided on one circumferential edge of the valve body end plate portion 110 , and the valve cover 30 is located inside the valve body extension portion 160 .

[0066] The movement trajectory of the valve cover 30 is limited by the valve body extension portion 160, further reducing the possibility of the valve cover 30 swinging left and right, while protecting the valve cover 30 from being damaged and playing a role in guiding the outflowing gas.

[0067] In order to improve the sealing effect of the passive valve when the valve cover 30 is closed, a sealing gasket 80 is provided between the valve body end plate 110 and the valve cover 30 , and the sealing gasket 80 is fixedly connected to the valve body end plate 110 .

[0068] As an embodiment of the present application, the sealing gasket 80 is a wire gasket.

[0069] Working principle:

[0070] When air flows from the air flow guide 70 to the passive valve, since the damping assemblies 60 are installed on the left and right sides of the valve cover 30, under the condition of small air flow, the torsion spring 420 in the pre-tightening assembly 40 has poor air pressure suppression under small air flow, so at this time the damping spring 610 in the damping assembly 60 plays a role. When the valve cover 30 opens forward or has the tendency to open forward and the concentric shaft 20 has a tendency to rotate, according to the insertion of the pin of the damping spring 610 into the edge segment groove 240, the damping spring 610 has a tendency to rotate with the concentric shaft 20, so the positive pressure acting on the damping plate 620 increases, thereby increasing the static friction between the damping plate 620 and the shaft support 410 when the concentric shaft 20 rotates, thereby controlling the vibration of the valve cover 30 and enhancing the valve cover 30's ability to resist airflow interference.

[0071] During the opening process of the valve cover 30, the torsion springs on the left and right sides achieve a balanced torsion force. Under the action of the concentric shaft 20, the two ends of the valve cover 30 are evenly stressed, and the preload reference angle of the torsion spring 420 is consistent, ensuring the consistency of the preload torque.

[0072] When the changes in the explosion airflow inside the engine cause unstable airflow pulses inside the entire exhaust system, the valve body diaphragm part 130 comes into play, and the airflow is blocked by the valve body diaphragm part 130 and dispersed to the circumference of the valve body pipe part 120, and enters the valve body pipe part 120 along the valve body pipe opening 120a, and finally passes through the valve body end plate opening 110a, pushes open the valve cover 30 and discharges the valve body 10, thereby avoiding the vibration caused by the unstable airflow directly impacting the valve cover 30, eliminating the corresponding abnormal noise generated inside the silencer system, and meeting the subjective evaluation and noise sound pressure level indicators of the vehicle.

[0073] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A passive exhaust valve for a muffler inner component, characterized by: include The valve body (10) comprises a valve body end plate portion (110) and a valve body tube portion (120), wherein the valve body end plate portion (110) is arranged at one end of the valve body tube portion (120), and a valve body hook portion (140) is provided at an edge of the valve body end plate portion (110) extending outward, and an open rotation space (150) is formed in the valve body hook portion (140); A concentric shaft (20) passes through the rotation space (150) and is capable of rotating along its own axis; A valve cover (30) is located on one side of the valve body end plate portion (110), wherein the edge of the valve cover (30) extends into the rotation space (150) and is fixedly connected to the concentric shaft (20), so that the valve cover (30) can be opened or closed on one side of the valve body end plate portion (110); A pre-tightening assembly (40) is respectively arranged at both ends of the valve body hook portion (140), and both ends of the concentric shaft (20) are respectively connected to the pre-tightening assembly (40) to provide a pre-tightening force for the valve cover (30). The pre-tightening assembly (40) includes a shaft support (410), a torsion spring (420) and a chuck (430). The shaft support (410) is fixed to one end of the valve body hook portion (140), and the chuck (430) is fixed to the concentric shaft (20). The torsion spring (420) is sleeved on the concentric shaft (20). One of the pins of the torsion spring (420) is fixed to the rotating shaft (50), and the other pin of the torsion spring (420) is fixed to the chuck (430), wherein an axial gap is respectively provided between the torsion spring (420) and the shaft support (410), and between the torsion spring (420) and the chuck (430); as well as A rotating shaft (50) is arranged parallel to the concentric shaft (20), and its two ends are respectively fixedly connected to the two pre-tightening components (40); The axis of the concentric shaft (20) and the axis of the rotating shaft (50) are respectively perpendicular to the axis of the valve body tube portion (120).

2. The passive exhaust valve for a muffler inner component according to claim 1, characterized in that: A plurality of torsion spring clamping holes (430a) for inserting the pins of the torsion spring (420) are evenly distributed on the end surface of the chuck (430), and the plurality of torsion spring clamping holes (430a) form a circle, the center of which is located on the axis of the concentric shaft (20).

3. The passive exhaust valve for a muffler inner component according to claim 1, characterized in that: Both ends of the valve body hook portion (140) are respectively contracted inward to form an accommodating groove (140a), and the shaft support (410) is arranged in the accommodating groove (140a).

4. The passive exhaust valve for a muffler inner component according to claim 1, characterized in that: The end surface of the shaft support (410) protrudes outward to form a protruding portion (410a), a concentric shaft hole (410b) for inserting the concentric shaft (20) is provided in the middle of the protruding portion (410a), a bearing (440) is provided inside the protruding portion (410a), and the bearing (440) is sleeved on the concentric shaft (20); and / or, A rotating shaft hole (410c) for inserting the rotating shaft (50) is provided on the end surface of the shaft support (410).

5. The passive exhaust valve for a muffler inner component according to any one of claims 1 to 4, characterized in that: It also includes two damping assemblies (60), wherein the two damping assemblies (60) are respectively arranged on the inner sides of the two pre-tightening assemblies (40); The damping assembly (60) comprises a damping spring (610) and a damping plate (620), wherein the damping spring (610) is arranged on the concentric shaft (20), and the damping plate (620) is pressed against the end surface of the shaft support (410) by the elastic force of the damping spring (610).

6. The passive exhaust valve for a muffler inner component according to claim 5, characterized in that: The concentric shaft (20) comprises a middle section (210), a shoulder (220), an edge section (230), and an edge section groove (240); the shoulders (220) are respectively provided at both ends of the middle section (210); the edge section (230) is provided at the other end of the shoulder (220); and the edge section groove (240) extends along the other end of the edge section (230) toward the shoulder (220); The valve cover (30) is connected to the middle section (210), the damping spring (610) is sleeved on the edge section (230) and located between the shaft shoulder (220) and the damping plate (620), and a pin of the damping spring (610) is inserted into the edge section groove (240).

7. The passive exhaust valve for a muffler inner component according to any one of claims 1 to 4, characterized in that: The valve body (10) further comprises a valve body diaphragm portion (130), wherein the valve body diaphragm portion (130) is arranged at the other end of the valve body tube portion (120), so that gas flowing toward the valve body tube portion (120) in the axial direction is blocked by the valve body diaphragm portion (130) and flows in the circumferential direction of the valve body tube portion (120); A plurality of valve body pipe openings (120a) are evenly distributed on the cylindrical surface of the valve body pipe portion (120). Gas passing through the circumference of the valve body pipe portion (120) enters the interior of the valve body pipe portion (120) from the valve body pipe openings (120a) and eventually flows out from the valve body end plate opening (110a) on the valve body end plate portion (110).

8. The passive exhaust valve for a muffler inner component according to claim 7, characterized in that: A valve body extension portion (160) is provided on one circumferential edge of the valve body end plate portion (110), and the valve cover (30) is located inside the valve body extension portion (160).

9. The passive exhaust valve for a muffler inner component according to claim 1, characterized in that: A sealing gasket (80) is provided between the valve body end plate portion (110) and the valve cover (30), and the sealing gasket (80) is fixedly connected to the valve body end plate portion (110).

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